opacheco

Logarithmic Vacuum Tube Amplifier
« on: May 12, 2020, 10:12:06 PM »
Hi,

Do someone  knows where I can find the theory behind of  Logarithmic Vacuum Tube Amplifier?; In the solid state case this theory is very common using Op Amps but in vacuum tubes that is very rare or almost impossible to get.

Thansk anticipated
opacheco.
I love the Vaccum Tubes Sound!!!


opacheco

Re: Logarithmic Vacuum Tube Amplifier
« Reply #1 on: May 13, 2020, 05:25:09 PM »
Any idea?

opacheco.
I love the Vaccum Tubes Sound!!!

Re: Logarithmic Vacuum Tube Amplifier
« Reply #2 on: May 13, 2020, 06:16:12 PM »
Sounds like you need an old book on analog computing. I'll have a look through my library, but I don't think much of my stuff covers that area.

EDIT: OK a quick browse turns up vacuum tube voltmeters as an application, so maybe this is useful to you, see page 935 (page 943 of the PDF):
https://www.americanradiohistory.com/Archive-Handbooks-Miscellaneous/Radio-Engineer%27s-Handbook-1.pdf
« Last Edit: May 13, 2020, 06:28:16 PM by merlin »

opacheco

Re: Logarithmic Vacuum Tube Amplifier
« Reply #3 on: May 13, 2020, 09:02:52 PM »
Sounds like you need an old book on analog computing. I'll have a look through my library, but I don't think much of my stuff covers that area.

EDIT: OK a quick browse turns up vacuum tube voltmeters as an application, so maybe this is useful to you, see page 935 (page 943 of the PDF):
https://www.americanradiohistory.com/Archive-Handbooks-Miscellaneous/Radio-Engineer%27s-Handbook-1.pdf

merlin, thanks for your response!
Let me see the linked book, but looks like your are right, I must search for  an "old book on analog computing"....I don't had thinking in that point of view!.

Thanks again,
opacheco
I love the Vaccum Tubes Sound!!!


 

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